Inert-gas mixture for use in metal inert-gas welding

ABSTRACT

An inert-gas mixture for use in metal inert-gas welding, in particular of nickel materials, is distinguished by a proportion by volume of N 2  of 0.5-2.0%, and the rest is argon.

BACKGROUND OF THE INVENTION

[0001] The invention relates to an inert-gas mixture for use in metalinert-gas welding. In particular, the invention relates to an inert-gasmixture for use in metal inert-gas welding of nickel materials.

[0002] The welding argon, which is normally used as the inert gas formetal inert-gas welding (MIG welding) of nickel materials does notensure adequate arc stability, as a result of which increased spatterformation occurs during welding and, furthermore, the flow behavior inthe welding bath is poorer.

SUMMARY OF INVENTION

[0003] The invention is based on the object of providing an inert-gasmixture for use in MIG welding, in particular of nickel materials, whichreduces the amount of spatter formed during the welding process andconsiderably improves the flow behavior.

[0004] The object is achieved by an inert gas which contains aproportion by volume of nitrogen (N₂) of 0.5-2.0%, and the rest is argon(Ar).

DETAILED DESCRIPTION

[0005] When carrying out MIG welding on nickel materials using theargon/nitrogen inert-gas mixture according to the invention, arcstability is ensured with a considerable reduction in the amount ofspatter formed and with a considerable improvement in the flow behavior,thus ensuring essentially optimized welding quality.

[0006] An inert-gas mixture which has been successfully tested inpractice for MIG welding of nickel materials has 1.0% of N₂ and the restis argon.

[0007] MIG welding tests with such an inert-gas mixture have led to goodresults, and thus to essentially optimized welding quality for nickelmaterials, both in terms of reducing the amount of spatter formed and interms of improving the flow behavior.

What is claimed is:
 1. An inert-gas mixture for use in metal inert-gaswelding, in particular of nickel materials, wherein said mixturecontains a proportion by volume of N₂ of 0.5-2.0%, and the rest isargon.
 2. The inert-gas mixture as claimed in claim 1 , wherein theproportion by volume of N₂ is 1.0%.